Drum for the winding on and winding off of cold rolled bands



H. SMEETS June 20, 1961 DRUM FOR THE WINDING ON AND WINDING OFF OF COLD ROLLED BANDS 4 sheets sheet 1 Filed Sept. 25, 1957 I I l I I I I l I I i ll. I I I l I I I I I I l| nfl flmlnmi i| ill -wi 11111 Ill! r lll l/wavrop H,me e235 June 20, 1961 H. SMEETS I DRUM FOR THE WINDING ON AND WINDING OFF OF COLD ROLLED BANDS 4 Sheets-Sheet 2 l] i K I Q Z N l l 1 P 'l l l I EJ812219 e123 DRUM FOR THE WINDING ON AND WINDING OFF OF GOLD ROLLED BANDS Filed Sept. 25, 1957 H. SMEETS June 20, 1961 4 Sheets-Sheet 3 lNVE/VTOR H. SMEETS June 20, 1961 DRUM FOR THE WINDING ON AND WINDING OFF OF COLD ROLLED BANDS 4 Sheets-Sheet 4 Filed Sept. 25, 1957 lNVENI'CM H Smeelgs lllll NM km hm WW QM w Wm,

. QM Q kw Nw R. m Wbux H United States Patent DRUM FOR THE WINDING ON AND WINDING OFF OF COLD ROLLED BANDS Helmut Smeets, Dusseldorf, Germany, assignor to Schloemann Aktiengesellschaft, Dusseldorf, Germany Filed Sept. '25, 1957, Ser. No. 686,181

Claims priority, application Germany Sept. 28, 1956 3 Claims. (Cl. 242-721) For the winding-on (also called reeling on) and for reeling oil of band-like material to be rolled, separate devices are used according to the hitherto known prior art. For the winding on usual winding drums are used, which consist of a plurality of segments spreadable by means of spreader body provided with wedge surfaces or of two movable and one fixed segment, in which case closing fillets can be disposed between the movable segments, by which the segments are spread. In this case it is necessary, more especially for the winding of thin bands, that the drum has in the winding position a closed periphery.

The winding off of reels of bands for the further working of the bands is generally carriedout also on spreader drums, which, it is true, need not have a closed periphery, but which must be spreadable over a large diameter range for the reception of reels of diiferent internal diameters and for the fixing of the same on the drum. There are spreader drums already known for the winding of hot rolled bands, which are adjustable to three diameter steps by axial movement of a spreader body provided with wedge surfaces. In this case the smallest diameter step serves for the pushing ofi of the band reels, the second step for the winding of the first turns, the band being pressed against the drum periphery by a rim of pressure rollers surrounding the drum. The further spreadability is provided in order to be able to tension the band after the laying on of the first turns. This drum has a closed outer diameter only in the smallest diameter step. Such drums are not suitable for the winding of cold rolled bands.

The object of the invention is a reeling drum, which can be used for the winding as well as the reeling oif of cold rolled bands or bands to be cold rolled.

The drum according to the invention has, as the known drums, a plurality of segments, which are spreadable by an axially movable spreader body. According to the invention there are provided between the segments closing fillets, known per se, which close without gaps the periphcry of the drum in the spread position of the drum provided for the winding of the bands, these closing fillets, like the segments, being spreadable up to this position by an axially movable spreader body provided with wedge surfaces, whereas the closing fillets are not spread at the further spreading of the segments, and the inclination of the wedge surfaces for the spreading of the closing fillets exceeds the inclination of the wedge surfaces for the spreading of the segments.

For the axial movement of the spreader body these are, according to a further feature of the invention, provided with a'piston rod which guides two pistons of difierent diameters in a stepped cylinder, of which the smaller one is connected fixedly with the piston rod, whereas the piston rod is restrictedly movable in relation to the large piston.

In the drum according to the invention the closing fillets serve at the same time for clamping fast the tip of the band to be wound. The arrangement of several closing fillets on the circumference of the drum and the similar construction of the same makes it possible to introduce the tip of the hand between one of the segments and one of the closing fillets independently of the actual position of the winding drum and to clamp it firmly between them.

In using the spreader drum as a winding device the tip of the band to be wound is introduced, in the un's'p'read position of the drum, into a slot existing between the closing fillets and the segments. By axial movement of the spreader body the closing fillets are first more rapidly spread than the segments, on account of the greater in? clination of their wedge surfaces as compared withthe inclination of the wedge surfaces serving for the spread-u ing of the segments and .thus they clamp the tip of the band fast. This spread position of the segments and closing fillets, in which they form a closed drum periphery, is

determined by the limitation of the stroke of the large,

moving piston and provides the central diameter step as the winding position of 'the spreader drum.

A band that has been taken 01f the drum on which it' was wound tends to expand and become loose. Therefore when it is replaced on the drum for, the purpose of being' unwound, the segments can be further spread out beyond the closing fillets by further axial movement of the spreader body by means of the smaller piston and by this means the band reels can be so firmly taken up or gripped by the drum that they do not rotate on the drum,,but a secure revolving of the band reels With the drum is ensured. Reels of smaller internal diameter can be positioned on the drum for reeling off when the latter is spaced to a diameter between the first and second diameter steps.

With simple closing fillets the winding drum however is suitable, in addition to the reeling off, for the winding of thin bands, as the tip of the band introduced between one closing fillet and a segment does not permit the whole spreading of the closing fillets. On this account gaps are provided between the other closing fillets and segments, the depth of the gaps. depending on the thickness of the clamped band tip. The play always present in the guides of the segments and closing fillets and the elasticity of the constructional elements of the Winding drum how.-

ever compensate for these gaps to a certain extent, so that in the winding of thin bands the winding drum therefore has a closed periphery, at least the gaps are negligibly small. On the other hand at the introduction of a relatively thick band tip unallowably large gaps arise between closing fillets and segments. In order to avoid the pro-f duction of such gaps between the segments and the closing fillets there is disposed according to a further feature of the inventiona clamping fillet at least on one closing' fillet disposed between the butt ends of the segments, for which purpose the closing fillet has over the length of its side surface facing a segment, a recess widening to- FIGURE 2 shows a cross-section according to II-.II;

of FIGURE 1 in drawn together position;

FIGURE 3 a corresponding cross-section at winding position; and

FIGURE 4 a corresponding cross-section in maximumj spread position.

FIGURE 5 shows a longitudinal section of a cylinder with piston for the axial movement of the spreader body.

The cylinder is disposed at the right of the winding drum' according to FIGURE 1.

As a second example of an embodiment there is shown a winding machine in itself the same as in the first exam-- ple of embodiment, one closing fillet is provided with a Patented June 20, 1961 special clamping fillet in order to be able to insert also thicker bands. Of this example of the embodiment.

FIGURE 6 shows a longitudinal section; and

FIGURE 7 a partial view of the cross-section in enlarged scale.

Finally a third example of embodiment is shown in FIGURE 8 in longitudinal section, in

FIGURE 9 in cross-section in the drawn together position, in

FIGURE 10 in a cross-section in winding position and FIGURE 11 in cross-section in maximum spread position of the drum.

1 is a spreader body so connected by keys 2 with a hollow shaft 3 as to be non-rotatable but longitudinally movable relatively thereto, which is provided with wedge surfaces 5 for the spreading of closing fillets 4, The wedge surfaces 5 are formed by thrust pieces 6 of highly wear-proof material and the closing fillets 4 run over rollers 7 for decreasing the friction, which rollers are mounted with their axes in the closing fillets. In the drawn together position of the drum, as shown in Figure 2, theclosing fillets 4 are held by springs 8on the spreader body 1. For this purpose bolts 9 are inserted in grooves 10 of the spreader body 1, and on to these bolts cap screws 11 are screwed, against which the springs 8 are supported. Segments 12, which are inserted in dovetail grooves 13 of the spreader body 1, form part of the actual drum for the reception of the band. Wedge surfaces 14 of the dovetail grooves 13, on which the segments 12 bear with their wedge surfaces 15, serve for the spreading of the segments 12 by movement of the spreader body 1. The moving of the spreader body 1 is carried out through a piston rod 23, the left end of which is firmly connected through a cover part 2311 with the spreader body 1. The right-hand end of the hollow shaft 3 is mounted in known manner rotatably but not slidably in a stationary bearing not shown, and carries a fixedly keyed pinion, which can be driven. The piston rod 23 protrudes out ofthe not shown end of the hollow shaft 3 and carries pistons 20 and 21 (Figure 5). This arrangement is known for example from the US. Patent No. 1,956,906.

The pistons 20 and 21 guided in the stepped cylinder 22 are acted on through a triple oil supply. The piston 21 is fixed to the piston rod 23, and the piston 20 is axially movable on the piston rod 23 The piston 20 is acted on on its front side 25 through the inflow bore 24 and in entraining the piston rod 23 and thus the piston 21, is moved axially up to the stop of the first cylinder step 26. At this operation of the piston 20 the segments 12 and the closing fillets 4 are brought out of their drawn together position (FIGURE 2) to the winding position (FIGURE 3). The second piston 21 on its front side 28 is acted on by the oil supply 27 and by this means the further spreading of the drum is effected up to the diameter step shown in FIGURE 4. The oil supply through the bore 29 effects the return of the piston 21 into its initial position taking with it the piston 20 over the piston rod 23.

In the drawn-together position of the drum, vide FIG- URE 2, the tip of the band to be wound is inserted into one of the slots existing between the closing fillets 4 and the segments 12. The angles of inclination of the wedge surfaces 5 spreading the closing fillets 4and the angles of inclination of the wedge surfaces 14 and spreading the segments are of dilferent magnitudes, the wedge surfaces 5 in the example of embodiment shown have an angle of inclination of 30", whereas the angle of inclination of the wedge surfaces 14 and 15 is only 10. By this means, at the axial movement of the spreader body 1 the closing fillets 4 approach the segments 12 (cf. FIGURE 3) and firmly clamp the inserted tip of the band. The segments 12 together with the closing fillets 4 form in this position a drum with closed periphery. In this case the piston 20, which moved the spreaderbody 1 therewith, has reached .4 its stroke limit. Owing to the smaller piston 21 connected after the piston 20 is acted upon the spreader body 1 is further axially moved. At this time, the wedge surfaces 14 spread, through the wedge surfaces 15, the segments 12 up to the third diameter step shown in FIGURE 4. On the path of the spreader body 1, on which the segments 12 are brought from the diameter step shown in FIG. 3 to the diameter step shown in FIGURE 4, the rollers 7 supporting the closing fillets 4 run on axially extending terminal surfaces on the pressure pieces 6. The closing fillets 4 at this time are thus not further spread. At the spreading of the drum beyond the diameter step shown on FIGURE 3 the drum has thus no longer a closed periphery. It then serves only for reeling off those rolls that have been taken off the drum, and have thereby become loosened, and somewhat expanded. For the safe mounting of the reels to be reeled off, the segments 12 at the receiving end 12a are conical.

In the second example of embodiment according to FIGURES 6 and 7 the parts marked 1 to 12 correspond to the similarly marked parts of the first example of embodiment.

The example of embodiment according to FIGURES 6 and 7 differs from the first example of embodiment by the fact that one single closing fillet 4a is differently constructed. It is provided with a recess 16 over the length of one of its side surfaces facing a segment 12, which recess is widened towards the centre of the drum. There is inserted into the recess 16 a wedge-shaped clamping fillet 16a which is radially and elastically supported against the closing fillet 4a by means of springs 17 let into the recess 16. In this case the radial play of the spring of the clamping fillet 16a in relation to the closing fillet 4a is made possible by longitudinal holes 18, into which screws 19 are inserted for the connection of the clamping fillet 16a with the closing fillet 4a.

The clamping fillet 1611 has on its side surface facing a segment 12 a fluting 16b whereas its side surface facing the recess 16 has a smooth surface. By this means the friction coefficient of the fluted side surface 16b to the clamped in band tip is greater than the friction coefficient of the opposite side surface of the clamping fillet 16a to the recess 16 in the closing fillet 4a. This difference of the friction coefiicients has the effect that the pull of the band being applied to the band 90 draws the fluted side surface 16b of the clamping fillet 16a against the segment 12 and thus firmly clamps the band, whereas the clamping fillet 16a slips relatively to the recess 16. With increasing pull of the band the clamping effect is thus increased. By the radial rnovability of the clamping fillet 16a against the force of the springs 17, bands of different thickness can be clamped without the spreading path of the closing fillets 4 being shortened. The clampin'g fillet 16a compresses the springs 17 more strongly towards the centre of the drum at the insertion of a thicker hand than at the insertion of a thin band and thus frees a wider slot to the segment adjacent to it. Closing fillets and segments therefore form in the winding position always a gapless closed drum jacket.

In the arrangement of one single closing fillet 4a with clamping fillet 16a this place on the periphery of the drum is preferably marked, for example by a colour. Several or all closing fillets like the closing fillet 4a can hgwever just as well be provided with a clamping fillet In the further example of embodiment shown in the FIGURES 8 to 11, 31 is the piston rod, which is axially movable in a central bore 32 of the axially unmovable drum core 33. The piston rod 31 is guided in a sleeve 34 inserted in the drum core 33. Wedge pieces 35 of highly wear-proof material are screwed onto the drum core 33. Corresponding wedge surfaces 37, bear against the wedge surfaces 36 of the wedge pieces 35 which belong to axially movable spreader fillets 38. The spreader fillets 38 are provided at their ends 39 with bores, in which radial arms or driving pins 40 engage, the axes of which extend radially to the drum core 33. The driving pins 40 are firmly connected with an annular body 41 movable on the drum core 33, which annular body is screwed to a web 42 by screws 43. The web 42 is let into a central, axially extending recess 44 to the drum core 33 and bears on the one hand against a stop 45 of the moving rod 31 and on the other hand is screwed by a nut 46 to the moving rod 31. The spreader fillets 38 are inserted into square guiding grooves 47 of the segments 48. The segments 48 have at their ends part-conical surfaces 49 and 50 on to which cone rings 53 and 54 provided with corresponding conical surfaces 51 and 52 are placed. On their front surfaces remote from the segments 48 the cone rings 53 and 54 are provided with recesses 55 and 56, into which pressure springs 57 and 58 are inserted. The pressure springs 57 and 58 are supported on the other hand in corresponding recesses 59 and 60 against the annular bodies 61 and 62. The cone rings 53 and 54 as well as the annular bodies 61 and 62 rest nonrotatably on the drum core 33. Roller bearings 64 and 65 rest on the drum core 33, and are braced against the annular body 61 by a nut 66 through a bushing 63. The roller bearings 64 and 65 carry a bearing casing 67, which is closed by a cover 68. A supporting frame can be placed in known manner against the bearing casing 67 for supporting the free end of the drum, which supporting frame can be again removed for the removal of a wound reel. The annular body 62 bears axially against a collar 69 of the drum core 33.

The annular body 41 connected with the piston rod 31 is further provided with axially extending recesses 70, into which ends 71 of further axially movable spreader fillets 72 can be pushed and are screwed to the annular body 41 by means of screws 73. The spreader fillets 72 are guided in grooves 74 let into the drum core 33 and have on their surfaces situated opposite to the grooves 74 wedge surfaces 75, which at the axial movement of the spreader fillets 72 act on the pressure rollers 76. The pressure rollers belong to closing fillets 77, which are disposed radially between the segments 48. The closing fillets 77 are held radially by screw bolts 78, which are inserted through springs 79 in recesses 80 in the closing fillets 77 and are screwed into the drum core 33. In this case the screw bolts 78 are guided through slots 81 of the spreader fillets 72.

The wedge surfaces 75, which serve for the spreading of the closing fillets, differ from the wedge surfaces 36 or 37, which spread the segments 48, by the size of their angle of inclination, the angle of inclination of the wedge surfaces 75 being greater than that of the wedge surfaces 36 and 37. By this means the closing fillets 77, which in the drawn together position corresponding to FIGURE 2 retire under the segments 48, are more rapidly spread than the latter, so that at reaching their end position (FIGURE 3) they have travelled a greater path than the segments 48. The segments 48 can be further spread beyond the outspread position of the closing fillets 77 to the position corresponding to FIGURE 4.

82 is a clamping fillet, which corresponds to the clamping fillet 16a of the second example of embodiment and is resiliently mounted in a recess 83 of a closing fillet 77 and extending radially of the drum. The spring is marked 84.

I claim:

1. A device for winding and unwinding cold-rolled bands and having a reeling drum comprising a periphery consisting of radially movable arcuate segments and radially movable arcuate closing fillets of lesser arcuate extent than and intervening between the segments, an axially displaceable spreader member within the drum, first wedge surfaces on the spreader member engageable vwith the segments, second wedge surfaces onthe member engageable with the closing fillets, means for axially displacing said member in one direction to a first position to engage the wedge surfaces with the segments and fillets to impel them radially outward from a radially innermost position to a first outermost position in which they form a substantially cylindrical surface of predetermined diameter upon which a band is wound during a winding operation, means including tapered extensions of the first wedge surfaces engageable with the segments for impelling them radially outward to a second position upon further movement of said member in the one direction from its first position, the second wedge surfaces having axially extending terminal surfaces engageable with the fillets for maintaining them in the first outermost position while the segments move to the second outward position, and further means for moving the spreader member in the one direction from the first position.

2. A reeling drum as claimed in claim 1, characterised by the fact that the angle of the wedge surfaces for the closing fillets is greater than the angle of the wedge surfaces for the segments.

3. For winding and unwinding cold-rolled bands, a reeling drum comprising: a rotatably mounted hollow shaft, a spreader body longitudinally slidable upon the said hollow shaft but keyed thereto to prevent relative rotation, external wedge surfaces on the spreader body, a plurality of segments the external surfaces of which form portions of the periphery of the drum, internal Wedge surfaces on the segments engaging some of the wedge surfaces of the spreader body, radially displaceable closing fillets located between the segments and adapted to complete the periphery of the drum, the closing fillets engaging some of the wedge surfaces of the spreader body, means for longitudinally sliding the spreader body in one direction to a first position for radially displacing the segments and the closing fillets, radially outward to a first position to form a substantially cylindrical surface of a predetermined diameter upon which a band may be wound during the winding operation, means including tapered extensions of the wedge surfaces of the spreader body which engage the segments for moving them radially outward from the first position thereof upon further movement of the spreader body in the one direction from its first position, the wedge surfaces on the spreader body engageablewith the fillets having axially extending terminal portions engageable with the fillets for maintaining them in their first said position during movement of the segments outwardly of their first position, and further means for mov ing the spreader body in the one direction away from its first position.

References Cited in the file of this patent UNITED STATES PATENTS 596,326 Hawkins Dec. 28, 1897 1,907,896 Summey May 9, 1933 1,956,906 Mikaelson May 1, 1934 2,329,044 Gollmer Sept. 7, 1943 2,394,503 Wilson Feb. 5, 1946 2,755,031 Russell July 17, 1956 

